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package Other;

/**
 *
 * @author Envy
 */
/*
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 * the editor.
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import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.DESedeKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class StringEncrypter {

    public static final String DESEDE_ENCRYPTION_SCHEME = "DESede";
    public static final String DES_ENCRYPTION_SCHEME = "DES";
    public static final String DEFAULT_ENCRYPTION_KEY = "This is a fairly long phrase used to encrypt";
    private KeySpec keySpec;
    private SecretKeyFactory keyFactory;
    private Cipher cipher;
    private static final String UNICODE_FORMAT = "UTF8";

    public StringEncrypter(String encryptionScheme) throws EncryptionException {
        this(encryptionScheme, DEFAULT_ENCRYPTION_KEY);
    }

    public StringEncrypter(String encryptionScheme, String encryptionKey)
            throws EncryptionException {

        if (encryptionKey == null) {
            throw new IllegalArgumentException("encryption key was null");
        }
        if (encryptionKey.trim().length() < 8) {
            throw new IllegalArgumentException(
                    "encryption key was less than 24 characters");
        }

        try {
            byte[] keyAsBytes = encryptionKey.getBytes(UNICODE_FORMAT);

            if (encryptionScheme.equals(DESEDE_ENCRYPTION_SCHEME)) {
                keySpec = new DESedeKeySpec(keyAsBytes);
            } else if (encryptionScheme.equals(DES_ENCRYPTION_SCHEME)) {
                keySpec = new DESKeySpec(keyAsBytes);
            } else {
                throw new IllegalArgumentException("Encryption scheme not supported: "
                        + encryptionScheme);
            }

            keyFactory = SecretKeyFactory.getInstance(encryptionScheme);
            cipher = Cipher.getInstance(encryptionScheme);

        } catch (InvalidKeyException e) {
            throw new EncryptionException(e);
        } catch (UnsupportedEncodingException e) {
            throw new EncryptionException(e);
        } catch (NoSuchAlgorithmException e) {
            throw new EncryptionException(e);
        } catch (NoSuchPaddingException e) {
            throw new EncryptionException(e);
        }

    }

    public String encrypt(String unencryptedString) throws EncryptionException {
        if (unencryptedString == null || unencryptedString.trim().length() == 0) {
            throw new IllegalArgumentException(
                    "unencrypted string was null or empty");
        }

        try {
            SecretKey key = keyFactory.generateSecret(keySpec);
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] cleartext = unencryptedString.getBytes(UNICODE_FORMAT);
            byte[] ciphertext = cipher.doFinal(cleartext);

            BASE64Encoder base64encoder = new BASE64Encoder();
            return base64encoder.encode(ciphertext);
        } catch (Exception e) {
            throw new EncryptionException(e);
        }
    }

    public String decrypt(String encryptedString) throws EncryptionException {
        if (encryptedString == null || encryptedString.trim().length() <= 0) {
            throw new IllegalArgumentException("encrypted string was null or empty");
        }

        try {
            SecretKey key = keyFactory.generateSecret(keySpec);
            cipher.init(Cipher.DECRYPT_MODE, key);
            BASE64Decoder base64decoder = new BASE64Decoder();
            byte[] cleartext = base64decoder.decodeBuffer(encryptedString);
            byte[] ciphertext = cipher.doFinal(cleartext);

            return bytes2String(ciphertext);
        } catch (Exception e) {
            throw new EncryptionException(e);
        }
    }

    private static String bytes2String(byte[] bytes) {
        StringBuffer stringBuffer = new StringBuffer();
        for (int i = 0; i < bytes.length; i++) {
            stringBuffer.append((char) bytes[i]);
        }
        return stringBuffer.toString();
    }

    public static class EncryptionException extends Exception {

        public EncryptionException(Throwable t) {
            super(t);
        }
    }
}
